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[all] It works!

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This commit is contained in:
Eryn Wells 2017-08-05 13:38:46 -07:00
parent dfa603012f
commit 8dcd0910f1
4 changed files with 73 additions and 66 deletions
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23
Metaballs/Shaders.metal
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@ -24,12 +24,8 @@ typedef struct {
float2 textureCoordinate;
} RasterizerData;
typedef struct {
int2 size;
int numberOfBalls;
} Parameters;
typedef half3 Ball;
typedef int3 Parameters;
typedef float3 Ball;
vertex RasterizerData
passthroughVertexShader(uint vid [[vertex_id]],
@ -42,20 +38,21 @@ passthroughVertexShader(uint vid [[vertex_id]],
return out;
}
float sampleAtPoint(float2, constant Ball*, uint);
float sampleAtPoint(float2, constant Ball*, int);
fragment float4
sampleToColorShader(RasterizerData in [[stage_in]],
constant Parameters& parameters [[buffer(0)]],
constant Ball* balls [[buffer(1)]])
{
const float sample = sampleAtPoint(in.textureCoordinate, balls, parameters.numberOfBalls);
const uint numberOfBalls = parameters.z;
const float sample = sampleAtPoint(in.position.xy, balls, numberOfBalls);
float4 out;
if (sample > 1.0) {
out = float4(0.0, 1.0, 0.0, 0.0);
out = float4(0.0, 1.0, 0.0, 1.0);
} else {
out = float4(0.0, 0.0, 0.0, 0.0);
out = float4(0.2, 0.2, 0.2, 1.0);
}
return out;
}
@ -63,11 +60,11 @@ sampleToColorShader(RasterizerData in [[stage_in]],
float
sampleAtPoint(float2 point,
constant Ball* balls,
uint count)
int count)
{
float sample = 0.0;
for (uint i = 0; i < count; i++) {
constant Ball& ball = balls[i];
for (int i = 0; i < count; i++) {
Ball ball = balls[i];
float r2 = ball.z * ball.z; // Radius stored in z coordinate.
float xDiff = point.x - ball.x;
float yDiff = point.y - ball.y;